How to Start Session Initiation Protocol Projects Using NS2

To stimulate a Session Initiation Protocol (SIP) project in NS2 has includes the replicate of network behaviour and congestion patterns for SIP-based communication systems like as VoIP (Voice over IP), video conferencing, or instant messaging. SIP works at the application layer and is used for session setup, management, and teardown. Here’s how you can get started:

Steps to Start Session Initiation Protocol Projects Using NS2

  1. Understand SIP
  • SIP Basics:
    • SIP is used for introduce modify, and terminate multimedia sessions.
    • Functions the UDP, TCP, or TLS for transport.
    • Key entities:
      • User Agents: Endpoints introducing or receiving the SIP requests.
      • Proxy Servers: Intermediaries for route messages in SIP.
      • Registrar Servers: It maintains the user registration.
  • Project Goals:
    • Replicate the SIP signaling and congestion flows.
    • Amount of performance metrices such as latency, packet loss, and jitter.
    • Validate the SIP scalability or reliability below different environments.
  1. Install and Set Up NS2
  1. Install NS2:

sudo apt-get install ns2

  1. Verify Installation:

ns

If the NS2 prompt opens, it’s ready for use.

  1. SIP Support in NS2: NS2 does not natively help for SIP, nevertheless we can:
    • Use the tool for NS2 SIP Module such as third-party extensions.
    • It replicates the SIP-like behavior using the tool TCP/UDP agents and create the congestion.
  1. Define the Project Scope

Decide your objectives:

  • It replicate the SIP call setup, media session, and teardown.
  • Effect of network environments are investigated for instance delay, congestion on SIP performance.
  • Examine the SIP scalability by various frequent calls.
  1. Create a Basic Network Topology

Model for topology by core SIP components:

  • User Agents (UA): Replicates the SIP clients for instance phones or applications.
  • Proxy Servers: Signify the intermediaries for routing SIP requests.
  • Registrar Servers: Accomplish the user registrations.
  1. Write a TCL Script

Here’s a sample TCL script for replicate the SIP-like behavior:

Example TCL Script:

# Create a new simulator instance

set ns [new Simulator]

# Open trace and NAM files

set tracefile [open sip_simulation.tr w]

$ns trace-all $tracefile

set namfile [open sip_simulation.nam w]

$ns namtrace-all $namfile

# Define nodes for User Agents (UA), Proxy, and Registrar

set ua1 [$ns node]

set proxy [$ns node]

set ua2 [$ns node]

# Define links between nodes

$ns duplex-link $ua1 $proxy 1Mb 10ms DropTail

$ns duplex-link $proxy $ua2 1Mb 10ms DropTail

# Attach TCP agents to simulate SIP signaling

set tcp1 [new Agent/TCP]

$ns attach-agent $ua1 $tcp1

set sink1 [new Agent/TCPSink]

$ns attach-agent $proxy $sink1

$ns connect $tcp1 $sink1

set tcp2 [new Agent/TCP]

$ns attach-agent $proxy $tcp2

set sink2 [new Agent/TCPSink]

$ns attach-agent $ua2 $sink2

$ns connect $tcp2 $sink2

# Simulate SIP signaling traffic using FTP over TCP

set ftp1 [new Application/FTP]

$ftp1 attach-agent $tcp1

$ftp1 set packetSize_ 512

set ftp2 [new Application/FTP]

$ftp2 attach-agent $tcp2

$ftp2 set packetSize_ 512

# Start and stop signaling traffic

$ns at 0.5 “$ftp1 start”

$ns at 1.0 “$ftp1 stop”

$ns at 1.5 “$ftp2 start”

$ns at 2.0 “$ftp2 stop”

# End simulation

$ns at 3.0 “finish”

proc finish {} {

global ns tracefile namfile

$ns flush-trace

close $tracefile

close $namfile

exec nam sip_simulation.nam &

exit 0

}

$ns run

  1. Run the Simulation
  1. Store the script as sip_simulation.tcl.
  2. Implement the process it:

ns sip_simulation.tcl

  1. Envision for the network using NAM:

nam sip_simulation.nam

  1. Analyze SIP Performance
  1. Trace File Analysis: Use the trace file (sip_simulation.tr) for estimate:
    • Latency: Calculate the duration for SIP messages we traverse the network.
    • Packet Loss: Classify the stopped packets during signaling.
    • Throughput: Estimate the rate of successful data transmission.
  2. Tools: Use tools like AWK, Python, or MATLAB for procedure the trace files and generates graphs.
  1. Experiment with Advanced Scenarios
  • Dynamic Topology Changes: Establish the failures or delays:

$ns at 2.0 “$ns link-down $proxy $ua2”

  • Concurrent Calls: Enhance the several sessions for SIP such as traffic sources to examine the scalability.
  • Network Conditions: Replication for congestion, high latency, or packet loss:

$ns queue-limit $ua1 $proxy 10

  1. Optional Enhancements
  • Realistic SIP Simulation: Execute the SIP-specific communications for instance INVITE, ACK, BYE in NS2 through changing the source code.
  • Media Traffic: Enhance the UDP-based congestion for sample RTP for the media session.
  • QoS Analysis: Analyse the impact of SIP signaling on media quality below different network environments.
  1. Document Your Findings

Include:

  • The document has including the objectives and methodology.
  • Then process for methodology based on the network topology and configurations.
  • After the process completes the methodology for sample latency, packet delivery and throughput.
  • Finally it includes the understandings and conclusions.
  1. Tools for SIP-Specific Projects
  1. Extensions for NS2:
    • Third-party of SIP modules such as if available.
    • Alter the NS2 source code for replicate the SIP-specific behavior.
  2. Alternative Tools:
    • SIPp: Create and validate for SIP traffic.
    • The ONE Simulator: Designed for DTN-based SIP replication.
    • OMNeT++: Intended for specific replication for SIP protocol.

Through this page, we gather the unique information about how to execute and analyse the outcomes for Session initiation protocol in ns2 tool. Any concerns regarding this project will be determined in an extra manual.